Manufacturing process for cements containing iron and alumina combinations



perature ofi-unyof ing the liuxture flj eri-mental results p H product possessing hydraulic qualities, what ever the burning'temp'eraturemaybe; The

iron combinations formed do notpossess bm g P QPe 'tleSJ I melting Patented May 25, 1926;

UNITED STAT-Es PATENT .mm esr mAnr moneIx-nN-rnoyencn, Ewen. i

. mANUFAorUBme rnocnss n Draw ng. y

This'invention reliites toe processof manufacturmg cements (conta ning, after burn mg, ron or aluminumcombinat ons possess,-

ing hydraulic bindingqualities, or mixture of these ingredients the cements being ob tained by burning the mixed raw materials at a temperature less then themeltingtem the ingredients compos' The formtition of e v v combinations isbased on the following; .ex

CaCOg for": each molecule of Feog' 'or equivalent, after burning does not give Q8.

,A' m1xture richer inlini 'as a bo e in! dica'ted, that is tois'ey', 8', mixture containing} more than two molecules of G'aCQ for one molecule ofFe,,() gives under certain bu rn ing conditions 'agprodl'ictwhichbinds hyff draulicallyQ the melting temperature" is reached the rodnot obtained is of minor quality an melted material doesnot possess hydraulic When the rew materials employed contain flint or alumina it is necessary to add to. the mixture one. molecule of CaCO for each- I molecule of alumina (A1 0 and twomole- 21 1 3 OaCO for each molecule of flint Thiarew materials susceptible of being -utilizedinthe manufactureof a cement according to the invention -are, besides limestone, iron'pyrite cinders resulting from the cement containing, iron p A 'oiiideor iron hydretes and CaCO,;,; containing two molecules or less" The combination ofthe iron oxide with E- the lime'begins at the temperature'et which. limestone dissociates! burning without, however, reaching the low-J I est melting pointof the materials ,compos-- ing the mixture, a prodnctisobtaincdwhich} possesses a slow binding action; As soonyas x Bycontinuing v the non cnmnms con'remme emmmx -comamerxons.

Application jlled september lly 19 g Sexist-No; bap ize. 7

S phuric ecid imenufacturin g" pretest; am

g enqut l zmg itiiecessery- -to add'f phursp'res'ent in tl H pyfitejicinders' it -is eacl fat'oni-of the sub shes ns' e-sulphide-"one 'gThemi xing up of the' previ'ously 'pulv'en ized' fra'wifmaterials" containing the uantity of. Git Q gasf so forth above may dim? eitheradirectly product icoming' from.

sen in es' 'sfoi-m len Items ary {to complete the" 7 one. in

emgloyed s'eparetelyibr infcombinationg pulver'ulentend inustg'pre 1 orefs residuzilsb.of elu ninuinflfactoriesf j bauxite, eto; 33nd *these muterials may be] molecule .of Ca'CO to neutielize the sulphur,

v done i th theiadditionf of Witterend-the helessential point w tho11t i1eafcl1i-ng the the jiiinture to s emed, the 'burningjmuy, I

be carried outin; two ormore-stages. {III this mannerfithe' mixture 'ii-iter the first. burning -is -thoroughlyfmixedffin any condition-end '.subsequentlysubmitted to. treatment in the .meltingpoint'] :The' cements containing iron combinations Prepared; iiccording "to the. 'process :t'o'rth' "are." co posed; oil-iron; combinations- (fer-' rites') possessing hydraulic binding qualities kiln while; always I "avoiding the 3and"alsolfaluminetes' or 'ferri alummates pos-z sessing the same qu lities when the raw ma teria'ls employed containinlumine.

T The. usual iron oit'ide obtained tbyifusiom any hydraulicsllybin ing product 'as the of ordinary cements well as, the alumine =cements-also obtame'ddr {.-fusiondo not give;

iron oxides end the-calcium combinations i thattheymay giyeunder.such -manufactur---:- 1 1 ing conditions (melting, fusionof the 'mix-"'-- 5 5 ture) remain onlyias inactiye quantities-.v..v. The cements according to, the present in vention, do not require, after'.burning,to be ground as; do an ordiner'y cements, which must. be carefully .groundinIorderto -be salable. It is possible to p) containing ironcom inations by mixing a cementprepared according to this invent-ion repare; mined cements.

with ordinary cement containing -alumine. is

The mixture may be utilized directly or after supp em nine v Thelcementscontaining as, binding elements iron comliinations alumina, ferrialuminates combined with calcium obtained Without reaching the melting point of the mixture give mortars which are particularlyresistant to the. action of sea water or of waters containing 'SO' 'Ca.

I claim:

1; A process of producingcements con? taining iron and aluminum combinations possessing hydraulic binding qualities, which consists in forming a mixture ofraw mate: rials containing CaCO Fe O and A1 in the proportions of moreithan two molecules of (521L for each molecule of Fe O and one molecule of CaC-O for each molecule of A1 0 and burning said mixture at a temta-ining. and

' as a. sulphide,

peratu-re below the melting-point of any of the ingredients. g

' 2* A processv of producingcements containing. iron and aluminum combinations possessing. consists in forminga mixture-of raw materials containin iron oxide in the form of iron I pyrite" cin ders; calcium carbonates and aluminum: in the proportions-of more than two I molecules of: (12100 for' each molecule of Fe O v and'onemolecule of CaCO for each molecule ofv A1 0 addin to. the mixture zap-quantity of CaClO su cient' to saturate the sulphur containedin the cinders and burning said mixture-ct a temperature below-the melting point 6t any of the ingredients e 3 -A process otproducing, cements con aluminum combinations hydrauliobinding. qualities, which possessing hydraulic binding qualitiesiwhich 'consists in forming a mixture of raw materials containing iron oxide in the form of iron pyrite cinders, calcium carbonate and.

aluminum in the pro ortions of more than two molecules of CaC for each molecule of Fe O and one molecule of CaCO for each molecule of A1 0 adding to the mixture one molecule of CaC for each atom of sulphur in the cinders," and burning said mixture at a temperature below the melting point of any of the ingredients.

4. A process of producing cements-containi-ng iron and aluminum combinations possessing hydraulic binding qualities, which consists in forming a mixture of raw materials containing: Ca'CO Fe 0 and A1 0 in the ,roportions of more than two molecules of (/aCO for each molecule Of FG OQ. and

one molecule of CaCO for each molecule of A1 0 and burning said mixture at perature between 1100 C. and 1300 C.

5. A process ofproduci-n-g cements containing. iron and aluminum combinations possessing hydraulic binding qualities, which consists in forming a mixture of raw materials. containing CaCO F6 0 an'd A1 0 in theproportions of more than two molecules of 05100 for each molecule of l re o and one molecule of CaCO for each" molecule of A1 0 ,v and burning said mixture at"a"t'em,- perature between" 1100 C. and l300.C., the rning stages. 7

In testimonywhereof I affix m ERNEST; iiARTIN.

a teinbeing accomplished in successive signature. 

